ECR for 5-Channel ESD Filter Box

Document #:

LIGO-E1500164-v1

Document type:

E - Engineering documents

Abstract:

A circuit board (D1500113) has been designed to provide filtering to the high voltage drive signals sent to the Electrostatic Drive actuation points in order to provide the following enhanced functionality:
1. Single stage filtration of each quadrant signal consisting of a pole-zero RC filter to enhance dynamic range while providing sufficient filtration
2. A rescaling of the RC ratio such that the filters present a higher impedance to the ESD amplifier in order to reduce the transient current flow that has caused trips in the ESD amplifier voltage monitoring function.
3. Inclusion of the 10k series resistor presently used for current limiting in the event of an in-vacuum discharge. This permits better packaging.

Files in Document:

• PDF Version (E1500164_ESD_5channelFilter-v1.pdf, 18.9 kB)

Other Files:

• Word Version (E1500164_ESD_5channelFilter-v1.docm, 28.9 kB)

Topics:

• Sensing and Control

Authors:

• Rich Abbott

Keywords:

ESD

Notes and Changes:

Approved 3/20/2015 by Dennis Coyne. See also
https://services.ligo-wa.caltech.edu/integrationissues/show_bug.cgi?id=1027

Related Documents:

• LIGO-D1500113: 5-Channel HV Filter for ESD